The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F COVER PAGE

OMB APPROVAL
OMB Number: 3235-0006
Expires: July 31, 2015
Estimated average burden
hours per response: 23.8

Report for the Calendar Year or Quarter Ended: 06-30-2021
Check here if Amendment   Amendment Number:
This Amendment (Check only one.):   is a restatement.
  adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name: CARDEROCK CAPITAL MANAGEMENT INC
Address: 2 WISCONSIN CIRCLE
SUITE 600
CHEVY CHASE , MD20815-7003
Form 13F File Number: 028-10166

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:
Name: Daniel A. Kane
Title: Chief Compliance Officer
Phone: 301-951-5288 x 120
Signature, Place, and Date of Signing:
Daniel A. Kane Chevy Chase , MD 07-30-2021
[Signature] [City, State] [Date]
Report Type (Check only one.):
X 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.)
  13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).)
  13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)
Form 13F Summary Page
Report Summary:
Number of Other Included Managers: 0
Form 13F Information Table Entry Total: 79
Form 13F Information Table Value Total: 364,698
(thousands)
List of Other Managers Reporting for this Manager:
[If there are no entries in this list, omit this section.]
Form 13F File Number Name

List of Other Included Managers:
Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.
[If there are no entries in this list, state “NONE” and omit the column headings and list entries.]
No. Form 13F File Number Name


SEC FORM 13F-HR

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE

OMB APPROVAL
OMB Number: 3235-0006
Expires: July 31, 2015
Estimated average burden
hours per response: 23.8

COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
Abbott Laboratories COM 002824100 6,952 59,967 SH SOLE 0 0 59,967
Accenture PLC Cl A COM G1151C101 12,699 43,079 SH SOLE 0 0 43,079
Adobe Inc COM 00724F101 11,072 18,905 SH SOLE 0 0 18,905
Air Products & Chemicals COM 009158106 4,595 15,973 SH SOLE 0 0 15,973
Akamai Technologies Inc COM 00971T101 1,554 13,327 SH SOLE 0 0 13,327
Alphabet Inc COM 02079K305 8,993 3,683 SH SOLE 0 0 3,683
Amazon.com COM 023135106 1,923 559 SH SOLE 0 0 559
American Tower Corp COM 03027X100 5,414 20,041 SH SOLE 0 0 20,041
Ametek COM 031100100 5,007 37,504 SH SOLE 0 0 37,504
Amgen COM 031162100 5,179 21,247 SH SOLE 0 0 21,247
Amphenol Corp COM 032095101 8,195 119,789 SH SOLE 0 0 119,789
Ansys COM 03662Q105 8,178 23,565 SH SOLE 0 0 23,565
Antares Pharma Inc COM 036642106 109 25,000 SH SOLE 0 0 25,000
Aon PLC COM G0403H108 5,744 24,059 SH SOLE 0 0 24,059
Apple Computer COM 037833100 19,634 143,357 SH SOLE 0 0 143,357
Aptargroup COM 038336103 2,690 19,098 SH SOLE 0 0 19,098
Automatic Data Proc COM 053015103 4,813 24,234 SH SOLE 0 0 24,234
Avid Bioservices Inc COM 05368M106 256 10,000 SH SOLE 0 0 10,000
Balchem Corp COM 057665200 2,139 16,296 SH SOLE 0 0 16,296
Becton Dickinson & Co COM 075887109 4,296 17,667 SH SOLE 0 0 17,667
Berkshire Hathaway Cl B COM 084670702 292 1,050 SH SOLE 0 0 1,050
Bristol-Myers Squibb COM 110122108 251 3,750 SH SOLE 0 0 3,750
Cadence Design Sys COM 127387108 4,608 33,681 SH SOLE 0 0 33,681
Canadian National Railway Corp COM 136375102 1,579 14,968 SH SOLE 0 0 14,968
Chevron Texaco Corp COM 166764100 391 3,731 SH SOLE 0 0 3,731
Church & Dwight COM 171340102 5,815 68,241 SH SOLE 0 0 68,241
Cintas Corp COM 172908105 3,815 9,986 SH SOLE 0 0 9,986
Clorox Co COM 189054109 272 1,510 SH SOLE 0 0 1,510
Costar Group Com COM 22160N109 2,557 30,870 SH SOLE 0 0 30,870
Costco Wholesale COM 22160K105 6,583 16,637 SH SOLE 0 0 16,637
D R Horton Inc COM 23331A109 2,075 22,965 SH SOLE 0 0 22,965
Danaher Corp COM 235851102 9,330 34,768 SH SOLE 0 0 34,768
DigitalBridge Group Inc COM 25401T108 118 15,000 SH SOLE 0 0 15,000
Ecolab COM 278865100 4,056 19,693 SH SOLE 0 0 19,693
Edward Lifesciences COM 28176E108 4,479 43,249 SH SOLE 0 0 43,249
Equinix Inc REIT COM 29444U700 2,141 2,668 SH SOLE 0 0 2,668
Extra Space Storage COM 30225T102 546 3,334 SH SOLE 0 0 3,334
Fair Isaac Corp COM 303250104 3,510 6,983 SH SOLE 0 0 6,983
Fiserv COM 337738108 4,790 44,815 SH SOLE 0 0 44,815
Fortinet Inc COM 34959E109 3,932 16,507 SH SOLE 0 0 16,507
Garmin Ltd COM H2906T109 1,786 12,351 SH SOLE 0 0 12,351
Generac Hldgs Inc COM 368736104 2,784 6,705 SH SOLE 0 0 6,705
Home Depot COM 437076102 6,822 21,394 SH SOLE 0 0 21,394
Honeywell COM 438516106 5,676 25,878 SH SOLE 0 0 25,878
Idexx Labs COM 45168D104 10,003 15,839 SH SOLE 0 0 15,839
Illinois Tool Works COM 452308109 5,687 25,437 SH SOLE 0 0 25,437
Intuit COM 461202103 10,079 20,562 SH SOLE 0 0 20,562
J P Morgan Chase COM 46625H100 4,049 26,035 SH SOLE 0 0 26,035
Johnson & Johnson COM 478160104 482 2,923 SH SOLE 0 0 2,923
Laboratory Corp COM 50540R409 7,239 26,242 SH SOLE 0 0 26,242
Lam Research Corp COM 512807108 1,669 2,565 SH SOLE 0 0 2,565
Lauder Estee Cos Inc COM 518439104 6,821 21,443 SH SOLE 0 0 21,443
Logitech Intl ADR COM H50430232 1,229 10,166 SH SOLE 0 0 10,166
Marriott Intl New Cl A COM 571903202 262 1,918 SH SOLE 0 0 1,918
Mastercard Worldwide COM 57636Q104 9,302 25,478 SH SOLE 0 0 25,478
McCormick & Co COM 579780206 4,659 52,754 SH SOLE 0 0 52,754
Merck & Co New COM 58933Y105 202 2,601 SH SOLE 0 0 2,601
Mettler Toledo Intl COM 592688105 7,326 5,288 SH SOLE 0 0 5,288
Microsoft Corp COM 594918104 11,642 42,974 SH SOLE 0 0 42,974
Moody's Corp COM 615369105 4,755 13,121 SH SOLE 0 0 13,121
NextEra Energy COM 65339F101 2,897 39,530 SH SOLE 0 0 39,530
Nike Cl B COM 654106103 8,837 57,200 SH SOLE 0 0 57,200
O'Reilly Automotive New COM 67103H107 5,984 10,569 SH SOLE 0 0 10,569
Paychex COM 704326107 599 5,585 SH SOLE 0 0 5,585
Paypal Hldgs Inc COM 70450Y103 2,218 7,608 SH SOLE 0 0 7,608
Roper Technologies Inc COM 776696106 5,356 11,391 SH SOLE 0 0 11,391
S&P Global Inc COM 78409V104 5,878 14,320 SH SOLE 0 0 14,320
Sherwin-Williams Co COM 824348106 5,279 19,375 SH SOLE 0 0 19,375
Solaredge Tech COM 83417M104 2,046 7,403 SH SOLE 0 0 7,403
Starbucks Corp COM 855244109 1,905 17,037 SH SOLE 0 0 17,037
T-Mobile US Inc COM 872590104 2,048 14,140 SH SOLE 0 0 14,140
TRPrice Assoc COM 74144T108 1,569 7,925 SH SOLE 0 0 7,925
Taiwan Semiconductor COM 874039100 14,222 118,356 SH SOLE 0 0 118,356
Teleflex COM 879369106 1,681 4,183 SH SOLE 0 0 4,183
Thermo Fisher Scientific COM 883556102 9,330 18,494 SH SOLE 0 0 18,494
Toro Co COM 891092108 6,699 60,967 SH SOLE 0 0 60,967
Union Pacific Corp COM 907818108 450 2,048 SH SOLE 0 0 2,048
UnitedHealth Grp COM 91324P102 1,975 4,932 SH SOLE 0 0 4,932
Waste Connections Inc COM 94106B101 2,668 22,340 SH SOLE 0 0 22,340